Open the door
There are several options.
Contact the management company or HOA. The locksmith of the housing and operational organization will help you get into the apartment. Plus: the service is usually inexpensive. Cons: it may be necessary to wait a long time, and then repair the door.
Call the Emergency Ministry on the phone 112. Rescuers not only save lives, but also help to return home. Pros: work fast. Less: they are unlikely to stand on ceremony with the safety of doors and windows.
Call industrial climbers. A great option if you live on the upper floors, and the window or balcony is ajar. Plus: property practically does not suffer. Cons: such specialists are not in all cities, their services are paid.
Apply to professionals. Scoring in the search engine "emergency opening of locks", you will find dozens of companies. Pros: Masters work around the clock, without days off and come in 30-60 minutes. They guarantee the safety of the property and open any locks. Less: expensive.
Whatever option you choose, you will need to prove that it is you who are the owner of the home. If there is a passport with a residence permit or there are a couple of neighbors who are ready to confirm your ownership, go to the third step. If housing removable, call the landlord.